Specimens must arrive within 24 hours of draw. Specimens must arrive in the testing laboratory weekdays by 2 p.m. Specimens arriving on the weekend may be canceled. Ship specimen overnight in an Ambient Mailer-Critical Specimens Only (Supply T668).

Date and time of draw and ordering physician's name and phone number are required.

The MML Expedite procedure is recommended to ensure specimens are processed as quickly as possible once received at Mayo Medical Laboratories. Contact 800-533-1710 to add this procedure to your order. A nominal fee will be charged.

Three separate specimens (a whole blood EDTA specimen and a whole blood sodium heparin specimen in addition to a control specimen) are required.